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Finding the Fourth Proportional to 79,681.68, 119,512.72 and 20,517.68

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Solution

The fourth proportional to 79,681.68, 119,512.72 and 20,517.68 is: 30,774.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,681.68 : 119,512.72 = 20,517.68 : x
  2. Step 2: Convert to fraction form
    79,681.68/119,512.72 = 20,517.68/x
  3. Step 3: Cross multiply
    79,681.68x = 119,512.72 × 20,517.68
  4. Step 4: Simplify right side
    79,681.68x = 2,452,123,744.89
  5. Step 5: Solve for x
    x = 2,452,123,744.89/79,681.68
  6. Step 6: Final answer
    x = 30,774.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.